Malicious PDF — malware analysis report

Static analysis result for SHA-256 8338e56fac57d58d…

MALICIOUS

PDF

90.3 KB Created: 2021-09-10 04:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 338bf88ff36fb6a37fae5bd871c27c71 SHA-1: 861e5ad0abec8551487800a4c0cb43add7abd17b SHA-256: 8338e56fac57d58ded29c57f6fc7440072e11f807db8f5543dc3075b55495fbb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these compromised hosts. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131cf92b7d45---wuxarix.pdf In PDF document text
    • https://atiksigorta.com/files/raruvewerodolupupotim.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/jesoxibeju.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/ravabatojawe.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/xamumab.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/56564631338.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/zifem.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/tulobolepajetufofaguv.pdfIn PDF document text
    • http://goghepcacloai.com/media/ftp/file/vajujebigawe.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/robix.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/95191795400.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/matonimudibepanixubo.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/napojidusufegazo.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/vupufebuba.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16136bd23c4d86---turanenawodemolaber.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139874e5f42b---wexaz.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/92414033731.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/fevoxapuzusu.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161375544c97f1---gowonudinolevijafen.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/48641468017.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/bomebitivuw.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/zitadonu.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/tapuwinonoturuse.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/vaxeketebolex.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/nojorigesumumele.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/49379542757.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=redmi+note+10+gaming+reviewPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11315 18644 bytes
SHA-256: eb156e74abc3dcf93ca1a98387ffd1492e1c7eb08616f4b841da75d2d072ef60
font_02_sfnt_off0001430f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1430F 10748 bytes
SHA-256: 35f6ad9afef4cfd063ea840725631400a84dff2555d41b136bf7164456d78ce4

Open this report in the interactive analyzer, or submit your own file for analysis.